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Park JK, Song JH, He TC, Nam SW, Lee JY, Park WS. Overexpression of Wnt-2 in colorectal cancers. Neoplasma 2009; 56:119-23. [PMID: 19239325 DOI: 10.4149/neo_2009_02_119] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
UNLABELLED The binding of the Wnt ligand to its receptor Frizzled, activates the Wnt canonical signaling pathway in carcinogenesis as well as many cellular processes, including cellular proliferation and differentiation. Wnt-2, one of 19 members of the <em>Wnt</em> gene family, is frequently overexpressed in malignant tissues. Here, in order to investigate the role of Wnt-2 in colorectal carcinogenesis, we examined the expression of the Wnt-2 protein in 120 colorectal cancers by immunohistochemistry. Wnt-2 protein was expressed in the cell membrane and cytoplasm and up-regulated in 74 (61.7%) of 120 colorectal cancers. Statistically, overexpression of Wnt-2 protein was not associated with the clinical and pathological parameters studied, including tumor location, tumor size, clinical stage, lymph node metastasis, and 5-year survival (<em>P > </em>0.05). These results indicate that up-regulation of the Wnt-2 protein might play a role in the development of colorectal cancers, as an early event of carcinogenesis. KEYWORDS Wnt-2 protein, expression, immunohistochemistry, tissue microarray, colon cancer.
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Lee YS, Lee IK, Kang WK, Cho HM, Park JK, Oh ST, Kim JG, Kim YH. Surgical and pathological outcomes of laparoscopic surgery for transverse colon cancer. Int J Colorectal Dis 2008; 23:669-73. [PMID: 18379794 PMCID: PMC2386750 DOI: 10.1007/s00384-008-0471-7] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 03/04/2008] [Indexed: 02/04/2023]
Abstract
PURPOSE Several multi-institutional prospective randomized trials have demonstrated short-term benefits using laparoscopy. Now the laparoscopic approach is accepted as an alternative to open surgery for colon cancer. However, in prior trials, the transverse colon was excluded. Therefore, it has not been determined whether laparoscopy can be used in the setting of transverse colon cancer. This study evaluated the peri-operative clinical outcomes and oncological quality by pathologic outcomes of laparoscopic surgery for transverse colon cancer. MATERIALS AND METHODS Analysis of the medical records of patients who underwent laparoscopic colorectal resection from August 2004 to November 2007 was made. Computed tomography, barium enema, and colonoscopy were performed to localize the tumor preoperatively. Extended right hemicolectomy, transverse colectomy, and extended left hemicolectomy were performed for transverse colon cancer. Surgical outcomes and pathologic outcomes were compared between transverse colon cancer (TCC) and other site colon cancer (OSCC). RESULTS Of the 312 colorectal cancer patients, 94 patients underwent laparoscopic surgery for OSCC, and 34 patients underwent laparoscopic surgery for TCC. Patients with TCC were similar to patients with OSCC in age, gender, body mass index, operating time, blood loss, time to pass flatus, start of diet, hospital stay, tumor size, distal resection margin, proximal resection margin, number of lymph nodes, and radial margin. One case in TCC and three cases in OSCC were converted to open surgery. CONCLUSIONS Laparoscopic surgery for transverse colon cancer and OSCC had similar peri-operative clinical and acceptable pathological outcomes.
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Park JK, Kang MY, Kim YH, Jo HC, Shin JK, Choi WJ, Lee SA, Lee JH, Choi WS, Paik WY. PKC delta in preeclamptic placentas promotes Bax dissociation from 14-3-3 zeta through 14-3-3 zeta phosphorylation. Placenta 2008; 29:584-92. [PMID: 18472156 DOI: 10.1016/j.placenta.2008.03.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2007] [Revised: 03/16/2008] [Accepted: 03/29/2008] [Indexed: 10/22/2022]
Abstract
OBJECTIVE We investigated placental apoptosis and the expression of and interactions between 14-3-3 and Bcl-2 family proteins during preeclampsia. In addition, we explored the mechanism of Bax dissociation from 14-3-3, hypothesizing that PKC-mediated phosphorylation of 14-3-3 results in dissociation of Bax from 14-3-3 proteins, and leads to apoptosis. METHODS Placental samples from 10 women with preeclampsia and 10 normotensive control patients were analyzed using M30-specific immunohistochemistry to assess placental apoptosis. Biochemical markers of cellular apoptosis, such as cleaved caspase-3, Bax, Bcl-2, 14-3-3, and PKC were followed by Western blotting. Interaction of 14-3-3 proteins with Bax and with PKC was assessed by immunoprecipitation. RESULTS M30-positive cells were widespread in the preeclamptic placentas. The levels of cleaved caspase-3, Bax, 14-3-3 zeta, phospho-(Ser)-14-3-3, and PKC delta were significantly higher in the preeclamptic placentas than in normal placentas. Preeclampsia was also associated with weaker interactions between 14-3-3 zeta and Bax and stronger interactions between 14-3-3 zeta and PKC delta. CONCLUSION Our results suggest that PKC delta in preeclamptic placentas promotes Bax dissociation from 14-3-3 zeta through the phosphorylation of 14-3-3 zeta. This finding may at least in part explain the apoptosis-inducing activity of PKC delta, revealing the important role of PKC delta in the development of apoptosis-related diseases such as preeclampsia.
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Ahn CH, Park HD, Lee YO, Park JK. Appearance of novel G-bacteria belonging to acidobacteria in a dairy wastewater treatment plant. ENVIRONMENTAL TECHNOLOGY 2008; 29:497-504. [PMID: 18661733 DOI: 10.1080/09593330801984530] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
A dairy wastewater treatment plant operates a sequencing batch reactor (SBR) and stimulates enhanced biological phosphorus removal (EBPR) process with alternating anaerobic and aerobic cycles. Occasionally, the plant suffers from a high suspended solids problem in the supernatant. Interestingly, the occurrence of high suspended solids coincided with times when the EBPR process failed to remove phosphorus. To find out if there was a relationship between the EBPR failure and the high suspended solids problem, effluent samples were collected from the site during the period of poor phosphorus removal and examined microscopically. It was found that cocci-shaped bacteria (3-4 microm in diameter) were abundant in the effluent samples and they were clustered in tetrads. These were believed to be G-bacteria and results of both Gram and Neisser staining tests were negative, suggesting that they had few intracellular polyphosphate granules. Using polymerase chain reaction (PCR), cloning and deoxyribonucleic acid (DNA) sequence analysis, the phylogenetic information of in situ G-bacteria was obtained. It was found that all of the recovered clones were clustered in the phylum of Acidobacteria.
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MESH Headings
- DNA, Bacterial/chemistry
- DNA, Bacterial/genetics
- Dairying
- Microscopy, Electron, Scanning
- Microscopy, Phase-Contrast
- Phosphorus/metabolism
- Phylogeny
- Polymerase Chain Reaction
- Proteobacteria/genetics
- Proteobacteria/growth & development
- Proteobacteria/isolation & purification
- Proteobacteria/metabolism
- RNA, Ribosomal, 16S/chemistry
- RNA, Ribosomal, 16S/genetics
- Waste Disposal, Fluid/methods
- Water Pollutants, Chemical/metabolism
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Lee MY, Koh SB, Koh JH, Nam SM, Shin JY, Shin YG, Kong ID, Ryu SY, Lee TY, Park JK, Chung CH. Relationship between gamma-glutamyltransferase and metabolic syndrome in a Korean population. Diabet Med 2008; 25:469-75. [PMID: 18346161 DOI: 10.1111/j.1464-5491.2008.02415.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
AIMS To investigate associations between gamma-glutamyltransferase (GGT) and components of metabolic syndrome (MS), insulin resistance and inflammatory markers in the Korean population. METHODS The 3508 subjects enrolled in this survey participated in the Korean Rural Genomic Cohort (KRGC) study. Written consent was obtained from the local ethical committee. Of these participants, 1437 were men (mean age 56.9 +/- 7.9 years) and 2071 were women (mean age 55.8 +/- 8.1 years). We measured GGT levels and various biochemical markers. To examine insulin resistance status, we used the homeostasis assessment method for insulin resistance (HOMA-IR). For inflammatory marker, we used C-reactive protein (CRP) levels. RESULTS Serum GGT levels were significantly higher in the MS group compared to the healthy patient group [23 (5-1403) vs. 19 (5-1920) IU/l; P = 0.01]. The prevalence of MS and adjusted relative risk were both significantly increased from the lowest to highest GGT quartiles; these results persisted after adjustments for multiple confounders. Positive correlations were established between GGT and HOMA-IR or CRP. CONCLUSION These results suggest that GGT levels may be a surrogate marker of insulin resistance, inflammation and MS.
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Kim TN, Balakrishnan A, Lee BC, Kim WS, Dvorankova B, Smetana K, Park JK, Panigrahi BB. In vitro fibroblast response to ultra fine grained titanium produced by a severe plastic deformation process. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2008; 19:553-7. [PMID: 17619956 DOI: 10.1007/s10856-007-3204-5] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2006] [Accepted: 06/06/2007] [Indexed: 05/16/2023]
Abstract
The in vitro response of the mouse fibroblast cell line 3T3 on the surface of ultrafine grained titanium [produced by a severe plastic deformation (SPD) process] has been studied in this work. SPD Ti showed much higher strength than the coarse grained Ti and equivalent to that of Ti-6Al-4V alloy. Better cell proliferation was observed on SPD Ti compared to conventional Ti and Ti-6Al-4V alloy. This could be attributed to the increased surface free energy by reduction in the grain size and possibly the presence of a large number of nano size grooves at the triple point junctions in SPD Ti sample. There was no significant difference in the results of cytotoxicity tests of fine and coarse grained materials.
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Kim DR, Ali M, Thiem VD, Park JK, von Seidlein L, Clemens J. Geographic analysis of shigellosis in Vietnam. Health Place 2007; 14:755-67. [PMID: 18296100 DOI: 10.1016/j.healthplace.2007.12.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2007] [Revised: 12/13/2007] [Accepted: 12/15/2007] [Indexed: 11/29/2022]
Abstract
Geographic and ecological analysis may provide investigators useful ecological information for the control of shigellosis. This paper provides distribution of individual Shigella species in space, and ecological covariates for shigellosis in Nha Trang, Vietnam. Data on shigellosis in neighborhoods were used to identify ecological covariates. A Bayesian hierarchical model was used to obtain joint posterior distribution of model parameters and to construct smoothed risk maps for shigellosis. Neighborhoods with a high proportion of worshippers of traditional religion, close proximity to hospital, or close proximity to the river had increased risk for shigellosis. The ecological covariates associated with Shigella flexneri differed from the covariates for Shigella sonnei. In contrast the spatial distribution of the two species was similar. The disease maps can help identify high-risk areas of shigellosis that can be targeted for interventions. This approach may be useful for the selection of populations and the analysis of vaccine trials.
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Han DH, Chae MR, So I, Park JK, Lee SW. The effects of dopamine receptor agonists on BK Ca channels and signal transduction mechanism in corpus cavernosal smooth muscle cells. Int J Impot Res 2007; 20:53-9. [PMID: 18094703 DOI: 10.1038/sj.ijir.3901623] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
In this study, we investigated the effect of dopamine receptor agonists on potassium channels' activity and their signal transduction pathway in corporal smooth muscle cells. We used cultured human corporal smooth muscle cells. The whole cell and cell-attached configuration of the patch-clamp technique were used for electrophysiological recordings, and enzyme immunoassay was used for measuring cyclic AMP (cAMP) and cyclic GMP levels. Extracellular application of 10 microM dopamine and apomorphine significantly increased whole-cell K(+) currents by 283.5+/-55.7% (at +60 mV; n=12, P<0.001), 292.4+/-58.8.0% (at +60 mV; n=9, P<0.005), respectively. We confirmed that the increase in whole-cell currents was mainly due to activation of the tetraethylammonium-sensitive large conductance Ca(2+)-activated K(+) channels (BK(Ca) channels). Enzyme immunoassay indicated that dopamine and apomorphine stimulates cAMP levels in corporal smooth muscle cells in a concentration-dependent fashion. The activation of BK(Ca) channels by dopamine receptor agonists in corporal smooth muscle cells might be one of the mechanisms in inducing penile erection.
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Park JK, Kim JW, Lee HJ, Chung JH, Ha EY, Oh DJ, Song JY. Dopamine beta-hydroxylase gene polymorphisms and psychotic symptoms in schizophrenia. Am J Med Genet B Neuropsychiatr Genet 2007; 144B:944-5. [PMID: 17503472 DOI: 10.1002/ajmg.b.30516] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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85
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Lee Y, Seo YJ, Lee JH, Park JK. High-dose prednisolone and psoralen ultraviolet A combination therapy in 36 patients with vitiligo. Clin Exp Dermatol 2007; 32:499-501. [PMID: 17608760 DOI: 10.1111/j.1365-2230.2007.02387.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
It is well known that systemic corticosteroids arrest the progress of vitiligo and lead to repigmentation, but they may produce unacceptable side-effects. The use of high-dose prednisolone therapy to minimize the side-effects of systemic steroids has been reported, but there have been no reports on the effectiveness of such treatment combined with phototherapy. We evaluated the efficacy and safety of combination therapy with intravenous prednisolone and psoralen ultraviolet A (PUVA). In 36 patients with vitiligo, intravenous methylprednisolone for 3 days was followed by PUVA twice weekly. After 6 months, vitiligo lesions on the face were reduced in size by 57.5%, on the upper extremities by 34.5%, on the trunk by 30.4% and on the lower extremities by 26.3%. Overall, improvement was seen in 13 patients (36.1%), with >50% repigmentation. Side-effects were mild and transient. We conclude that combination treatment of high-dose prednisolone therapy and PUVA may represent a highly effective therapeutic option for generalized vitiligo.
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Kim TN, Balakrishnan A, Lee BC, Kim WS, Smetana K, Park JK, Panigrahi BB. In vitro
biocompatibility of equal channel angular processed (ECAP) titanium. Biomed Mater 2007; 2:S117-20. [DOI: 10.1088/1748-6041/2/3/s06] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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87
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Kim HJ, Lee JY, Kim SH, Seo YJ, Lee JH, Park JK, Kim MH, Cinn YW, Cho KH, Yoon TY. Stromelysin-3 expression in the differential diagnosis of dermatofibroma and dermatofibrosarcoma protuberans: comparison with factor XIIIa and CD34. Br J Dermatol 2007; 157:319-24. [PMID: 17596171 DOI: 10.1111/j.1365-2133.2007.08033.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND The distinction between dermatofibroma (DF) and dermatofibrosarcoma protuberans (DFSP) is a well-known challenge for dermatopathologists. Immunohistochemical stains have been used to augment routine histological examination to aid in differentiating DF from DFSP. Stromelysin-3 (ST3) is a member of the matrix metalloproteinase (MMP) family, MMP-11, which is expressed in the skin during wound healing and in the stroma of basal cell carcinoma. Recent studies demonstrated that DFs expressed ST3, whereas DFSPs were only rarely ST3 positive. OBJECTIVES To assess the expression of ST3 in DF and DFSP and to ascertain whether ST3 is superior to factor XIIIa or CD34 in differentiating DF from DFSP, by comparison with factor XIIIa and CD34 expression. METHODS Immunohistochemical staining was performed on 23 cases of DF and 17 cases of DFSP, using antibodies to ST3, factor XIIIa and CD34. RESULTS ST3 was expressed in all cases of DF (23 of 23) but only one case showed weakly positive staining in DFSP (one of 17). The mean +/- SD ST3 immunohistochemistry (IHC) score in DF was 4.52 +/- 0.67. The sensitivity of ST3 was 100% and the specificity was 94%. Factor XIIIa was expressed in all cases of DF (23 of 23) and in five of the 17 DFSPs. The mean +/- SD factor XIIIa IHC score in the DFs was 4.43 +/- 0.73. The sensitivity of factor XIIIa was 100% and the specificity was 71%. CD34 was expressed in four of the 23 DFs and 16 of the 17 DFSPs. The mean +/- SD CD34 IHC score in the DFSPs was 4.41 +/- 1.37. The sensitivity of CD34 was 94% and the specificity was 83%. CONCLUSIONS Immunohistochemical staining with a commercial anti-ST3 antibody can be successfully carried out in routine dermatopathology. We confirmed that ST3 is a positive marker for DF and that ST3 staining might be more reliable than factor XIIIa staining in differential diagnosis of DF and DFSP. As the present study showed that ST3 was not absolutely negative in all cases of DFSP, the combination with CD34 immunostaining could make the distinction more reliable.
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Dong BQ, Ye Q, Cui XL, Yang J, Gong J, Yang M, Liao HZ, Wei SL, Zhang J, Wu XH, Si GA, Yang HH, Tsuzuki A, Park J, Ali M, Ochiai LR, Clemens JD. [Evaluation on the safety of a group A + C meningococcal polysaccharide vaccine]. ZHONGHUA LIU XING BING XUE ZA ZHI = ZHONGHUA LIUXINGBINGXUE ZAZHI 2007; 28:417-21. [PMID: 17877164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
OBJECTIVE To evaluate the safety of a group A + C meningococcal polysaccharide vaccine as part of a phase IV clinical trial. METHODS The study area was divided into 108 clusters according to the principle of cluster randomization, stratified and paired sampling methods. 54 out of 108 clusters served as observation groups were administered A + C vaccine, while the rest 54 groups were administered Vi polysaccharide vaccine. An adverse event surveillance system was established to monitor the adverse events following the vaccination campaign. Identical form and methods were used for data collection to investigate the adverse events following the vaccination of both A+ C vaccine and Vi vaccine. RESULTS 34,543 people were vaccinated, including 18,167 of whom received A + C vaccine, while the other 16,376 received Vi vaccine. The rates of immediate injection reaction and unsolicited non-serious adverse events from A + C vaccine group were 0.44% and 0.38% while of Vi vaccine group were 0.79% and 0.73% respectively. At the solicited adverse event survey on 3-day-post-vaccination, 1239 vaccinees were followed-up including 771 received A + C vaccine and 468 received Vi vaccine. The local injection reaction rate of A + C vaccine group on the 1st day was significantly higher (X2 = 13.98, P = 0.0002) than that of Vi vaccine group. Neither the local injection reaction rate nor the system reaction rate between both groups was significantly different on 2nd and 3rd day, post vaccination. It was not statistically different when comparing fever onset rate between those who received vaccine and those who did not, in each vaccine group. There were no serious adverse events observed. CONCLUSION Results showed that the side effects of A + C vaccine and the Vi vaccine were mild and safe for vaccination campaigns targeting on populations at different age.
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Whang LM, Filipe CDM, Park JK. Model-based evaluation of competition between polyphosphate- and glycogen-accumulating organisms. WATER RESEARCH 2007; 41:1312-24. [PMID: 17275874 DOI: 10.1016/j.watres.2006.12.022] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2006] [Revised: 11/20/2006] [Accepted: 12/06/2006] [Indexed: 05/13/2023]
Abstract
Many studies show that glycogen-accumulating non-polyphosphate organisms (GAOs) can compete with polyphosphate-accumulating organisms (PAOs) for organic substrate under anaerobic conditions and may indeed cause the deterioration of enhanced biological phosphorus removal (EBPR) systems. Understanding their behaviors in an anaerobic/aerobic (A/O) system at different operational conditions is essential in developing control strategies that ensure EBPR. A model-based evaluation of competition between PAOs and GAOs under different operational conditions was presented in this study. At 30 degrees C and a 10-day sludge age, the dominance of GAOs in the A/O sequencing batch reactor (SBR) was strongly dependent upon their considerable kinetic advantage in anaerobic acetate uptake. At 20 degrees C and a 10-day sludge age, the kinetic advantage of GAOs in anaerobic acetate uptake could be less, compared to that at 30 degrees C and a 10-day sludge age, leading to the relative dominance of PAOs and a stable phosphorus removal in the A/O system. At 30 degrees C and a 3-day sludge age, the parameters responsible for determining the aerobic distribution of anaerobically stored X(PHA) for both PAOs and GAOs, other than kinetic parameters of anaerobic acetate uptake, are important for them being dominant in the A/O SBR. In a situation when the q(PHA,P) value is lower than q(PHA,G) but comparable, PAOs may still be dominant in the A/O SBR, presumably because their aerobic conversion fraction of biomass production from PHA was higher than that of the GAOs.
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Hong S, Lee JS, Park JW, Nam K, Choi J, Lee JC, Park JK, Ko YP, Jo YH. Development of an implantable intrathecal drug infusion pump. CONFERENCE PROCEEDINGS : ... ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL CONFERENCE 2007; 2004:3440-2. [PMID: 17271024 DOI: 10.1109/iembs.2004.1403965] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
An intrathecal drug infusion system has been designed, manufactured and tested. The system is composed of a drug reservoir and a pump/controller assembly. The drug reservoir made of SUS316L is a negative pressure gas chamber enclosing a bellows type drug chamber. The pump/controller assembly includes a bacterial filter, a controller circuit board, a battery and a micropump, and is connected to a catheter for intrathecal infusion. The micropump implements a peristaltic pumping of the drug by a sequential motion of three pairs of cam and cam-follower. In vitro performance tests were conducted with prototypes.
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Ali M, Thiem VD, Park JK, Ochiai RL, Canh DG, Danovaro-Holliday MC, Kaljee LM, Clemens JD, Acosta CJ. Geographic analysis of vaccine uptake in a cluster-randomized controlled trial in Hue, Vietnam. Health Place 2007; 13:577-87. [PMID: 17254831 DOI: 10.1016/j.healthplace.2006.07.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2005] [Revised: 06/21/2006] [Accepted: 07/04/2006] [Indexed: 10/23/2022]
Abstract
This paper identifies spatial patterns and predictors of vaccine uptake in a cluster-randomized controlled trial in Hue, Vietnam. Data for this study result from the integration of demographic surveillance, vaccine record, and geographic data of the study area. A multi-level cross-classified (non-hierarchical) model was used for analyzing the non-nested nature of individual's ecological data. Vaccine uptake was unevenly distributed in space and there was spatial variability among predictors of vaccine uptake. Vaccine uptake was higher among students with younger, male, or not literate family heads. Students from households with higher per-capita income were less likely to participate in the trial. Residency south of the river or further from a hospital/polyclinic was associated with higher vaccine uptake. Younger students were more likely to be vaccinated than older students in high- or low-risk areas, but not in the entire study area. The findings are important for the management of vaccine campaigns during a trial and for interpretation of disease patterns during vaccine-efficacy evaluation.
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Lichtenberg A, Tudorache I, Suprunov M, Cebotari S, Tudorache G, Park JK, Goerler H, Brandes G, Breymann T, Haverich A, Hilfiker A. In vivo repopulation of decellularized bovine jugular valved vein grafts with autologous cells occurs in sheep when implanted in pulmonary valve position. Thorac Cardiovasc Surg 2007. [DOI: 10.1055/s-2007-967543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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93
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Meier M, Park JK, Menne J, Lindschau C, Leitges M, Haller H. Reduced oxidative stress in hyperglycaemic protein kinase C zeta knock-out mice does not protect against diabetic nephropathy. DIABETOL STOFFWECHS 2007. [DOI: 10.1055/s-2007-982158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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94
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Lichtenberg A, Suprunov M, Tudorache I, Cebotari S, Tudorache G, Bagaev E, Ringes-Lichtenberg S, Park JK, Brandes G, Hilfiker A, Haverich A. Integrative capacity and functional competence of detergent-decellularized xenogeneic pulmonary valves. Thorac Cardiovasc Surg 2007. [DOI: 10.1055/s-2007-967545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Abstract
Motor loss caused by herpes zoster is infrequent, and only a few studies have focused on ocular motor paralysis in ophthalmic herpes zoster. We report a case of complete ophthalmoplegia resulting from ophthalmic herpes zoster. A 69-year-old man presented with complete left-side ptosis with total ophthalmoplegia 7 days after the onset of left ophthalmic herpes zoster. The patient was treated with aciclovir and prednisolone. Five months later, the ptosis had resolved and the extraocular motility had almost returned to normal.
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Sim KB, Park JK. A nodular calcification of the alar ligament simulating a fracture in the craniovertebral junction. AJNR Am J Neuroradiol 2006; 27:1962-3. [PMID: 17032875 PMCID: PMC7977905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
We report a case of an incidental nodular calcification of the alar ligament simulating a fracture in the craniovertebral junction of a previously healthy 24-year-old man. Three-dimensional CT and MR imaging revealed a 7.2 x 7.6 x 4.0 mm nodular calcification in the right alar ligament with normal adjacent bony structures. Serial cervical dynamic radiographs and open-mouth views showed that the cervical spine was stable without any change in the calcification.
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Lee YS, Choi DK, Kim CD, Im M, Mollah ML, Jang JY, Oh TJ, An S, Seo YJ, Hur GM, Cho MJ, Park JK, Lee JH. Expression profiling of radiation-induced genes in radiodermatitis of hairless mice. Br J Dermatol 2006; 154:829-38. [PMID: 16634882 DOI: 10.1111/j.1365-2133.2006.07200.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
BACKGROUND Radiation induces many cellular events leading to radiodermatitis. OBJECTIVES The aim of this study was to establish a radiodermatitis model using experimental animals, and to examine the expression profile of radiation-induced genes. METHODS Hairless mice were irradiated on the dorsal skin; then total RNAs were isolated and microarray hybridizations were performed. RESULTS Irradiation with a total of 40 Gy (10 Gy day-1 for four consecutive days) provokes radiodermatitis in the hairless mouse. After microarray analysis, 130 genes that showed upregulation by radiation were selected and organized into four different clusters, depending on the time-kinetic pattern. Classification of these genes into several functional categories revealed that various biological processes were globally affected by radiation. These include transcription regulation, signal transduction, cell communication, cell death regulation and metabolism. CONCLUSIONS These results demonstrate the complexity of the transcriptional profile of the radiation response, providing important clues on which to base further investigations of the molecular events underlying radiodermatitis.
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Emch M, Ali M, Park JK, Yunus M, Sack DA, Clemens JD. Relationship between neighbourhood-level killed oral cholera vaccine coverage and protective efficacy: evidence for herd immunity. Int J Epidemiol 2006; 35:1044-50. [PMID: 16723370 DOI: 10.1093/ije/dyl100] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVES The effectiveness of vaccines in populations must consider both direct and indirect protection. This study reanalyses data from a large individually randomized oral cholera vaccine trial that was conducted in rural Bangladesh from 1985 to 1990. A recent analysis of the results of that trial showed that the proportion of people in household clusters who received the vaccine was inversely related to placebo incidence during the first year of surveillance, which was attributed to herd immunity. METHODS In this study we measure the relationship between neighbourhood-level oral cholera vaccine coverage and protective efficacy (PE) during a 2 year follow-up period, controlling for known effect modifiers. We link trial data to a household geographic information system to facilitate the neighbourhood-level analysis. Findings Neighbourhood-level PE can be partially explained by vaccine coverage after adjusting for ecological variables. CONCLUSIONS The inverse relationship between vaccine coverage and efficacy illustrates that people living in high-coverage areas may be indirectly protected from cholera because people living around them are vaccinated.
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Ali M, Park JK, von Seidlein L, Acosta CJ, Deen JL, Clemens JD. Organizational aspects and implementation of data systems in large-scale epidemiological studies in less developed countries. BMC Public Health 2006; 6:86. [PMID: 16584571 PMCID: PMC1450272 DOI: 10.1186/1471-2458-6-86] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2005] [Accepted: 04/04/2006] [Indexed: 11/29/2022] Open
Abstract
Background In the conduct of epidemiological studies in less developed countries, while great emphasis is placed on study design, data collection, and analysis, often little attention is paid to data management. As a consequence, investigators working in these countries frequently face challenges in cleaning, analyzing and interpreting data. In most research settings, the data management team is formed with temporary and unskilled persons. A proper working environment and training or guidance in constructing a reliable database is rarely available. There is little information available that describes data management problems and solutions to those problems. Usually a line or two can be obtained in the methods section of research papers stating that the data are doubly-entered and that outliers and inconsistencies were removed from the data. Such information provides little assurance that the data are reliable. There are several issues in data management that if not properly practiced may create an unreliable database, and outcomes of this database will be spurious. Results We have outlined the data management practices for epidemiological studies that we have modeled for our research sites in seven Asian countries and one African country. Conclusion Information from this model data management structure may help others construct reliable databases for large-scale epidemiological studies in less developed countries.
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Thiem VD, Deen JL, von Seidlein L, Canh DG, Anh DD, Park JK, Ali M, Danovaro-Holliday MC, Son ND, Hoa NT, Holmgren J, Clemens JD. Long-term effectiveness against cholera of oral killed whole-cell vaccine produced in Vietnam. Vaccine 2006; 24:4297-303. [PMID: 16580760 DOI: 10.1016/j.vaccine.2006.03.008] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2005] [Revised: 02/19/2006] [Accepted: 03/02/2006] [Indexed: 10/24/2022]
Abstract
We assessed the long-term protection afforded by a killed whole-cell oral cholera vaccine produced in Vietnam. A mass immunization of children and adults with the killed whole-cell oral cholera vaccine was undertaken in half of the communes of Hue, Vietnam, in 1998; the remaining communes were immunized in 2000. No cholera was observed in Hue until 2003, when an outbreak of El Tor cholera made it possible to conduct a case-control study. The overall vaccine effectiveness 3-5 years after vaccination was 50% (9-63%). This low-cost, easily administered vaccine should be considered as a tool for the control of cholera.
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